The elementary stages of any subject (usually plural).

synoniemen: ABC, ABC's, ABCs, alphabet, rudiments.

Roget 496: maxim, aphorism; apothegm, apophthegm^†; dictum, saying, adage, saw, proverb; sentence, mot [Fr.], motto, word, byword, moral, phylactery, protasis^†.    axiom, theorem, scholium^†, truism, postulate.    first principles, a priori fact, assumption (supposition) 514.    reflection etc. (idea) 453; conclusion etc. (judgment) 480; golden rule etc. (precept) 697; principle, principia [Lat.]; profession of faith etc. (belief) 484; settled principle, accepted principle, formula.    accepted fact.    received truth, wise maxim, sage maxim, received maxim, admitted maxim, recognized maxim &c.; true saying, common saying, hackneyed saying, trite saying, commonplace saying etc. ... meer laten zien

Nederlands: alfabet, ABC
Pools: narząd szczątkowy, rudyment